xfwm4 stores important default keybinds inside the "custom" section.
These important keybinds were removed in commit d5458a9fcf
as I thought they would be added automatically back in. This regression
is now reverted.
the desktop environment can be included via `self.nixosModules.nixos95`
this will expose two options (for now):
nixos95.enable -> enable the desktop environment
nixos95.wallpaper -> path to the wallpaper to use
currently the setup is closy coupled to this configuration,
which will change in the future, so it can be used with any configuration